/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/conformance/expressions/optionalChaining/callChain/callChain.2.ts ===
declare function AssertType(value:any, type:string):void;
declare const o1: undefined | (() => number);
AssertType(o1, "() => number");

o1?.();
AssertType(o1?.(), "number");
AssertType(o1, "() => number");

declare const o2: undefined | { b: () => number };
AssertType(o2, "{ b: () => number; }");
AssertType(b, "() => number");

o2?.b();
AssertType(o2?.b(), "number");
AssertType(o2?.b, "() => number");

declare const o3: { b: (() => { c: string }) | undefined };
AssertType(o3, "{ b: union; }");
AssertType(b, "() => {    c: string;}");
AssertType(c, "string");

o3.b?.().c;
AssertType(o3.b?.().c, "string");


